Componentize DriveMetricsProvider*

chrome/browser/metrics/drive_metrics_provider_linux.cc

Index: chrome/browser/metrics/drive_metrics_provider_linux.cc
diff --git a/chrome/browser/metrics/drive_metrics_provider_linux.cc b/chrome/browser/metrics/drive_metrics_provider_linux.cc
deleted file mode 100644
index 93c37a037d6744f404bb977971f0836e91c80555..0000000000000000000000000000000000000000
--- a/chrome/browser/metrics/drive_metrics_provider_linux.cc
+++ /dev/null
@@ -1,60 +0,0 @@
-// Copyright 2015 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "chrome/browser/metrics/drive_metrics_provider.h"
-
-#include <linux/kdev_t.h>  // For MAJOR()/MINOR().
-#include <sys/stat.h>
-#include <string>
-
-#include "base/files/file.h"
-#include "base/files/file_path.h"
-#include "base/files/file_util.h"
-#include "base/strings/stringprintf.h"
-
-#if defined(OS_CHROMEOS)
-#include "base/sys_info.h"
-#endif
-
-namespace {
-
-// See http://www.kernel.org/doc/Documentation/devices.txt for more info.
-const int kFirstScsiMajorNumber = 8;
-const int kPartitionsPerScsiDevice = 16;
-const char kRotationalFormat[] = "/sys/block/sd%c/queue/rotational";
-
-}  // namespace
-
-// static
-bool DriveMetricsProvider::HasSeekPenalty(const base::FilePath& path,
-                                          bool* has_seek_penalty) {
-#if defined(OS_CHROMEOS)
-  std::string board = base::SysInfo::GetLsbReleaseBoard();
-  if (board != "unknown" && board != "parrot") {
-    // All ChromeOS devices have SSDs. Except some parrots.
-    *has_seek_penalty = false;
-    return true;
-  }
-#endif
-
-  base::File file(path, base::File::FLAG_OPEN | base::File::FLAG_READ);
-  if (!file.IsValid())
-    return false;
-
-  struct stat path_stat;
-  int error = fstat(file.GetPlatformFile(), &path_stat);
-  if (error < 0 || MAJOR(path_stat.st_dev) != kFirstScsiMajorNumber) {
-    // TODO(dbeam): support more SCSI major numbers (e.g. /dev/sdq+) and LVM?
-    return false;
-  }
-
-  char sdX = 'a' + MINOR(path_stat.st_dev) / kPartitionsPerScsiDevice;
-  std::string rotational_path = base::StringPrintf(kRotationalFormat, sdX);
-  std::string rotates;
-  if (!base::ReadFileToString(base::FilePath(rotational_path), &rotates))
-    return false;
-
-  *has_seek_penalty = rotates.substr(0, 1) == "1";
-  return true;
-}